My experience has been that hair changes continue , mainly quite subtle, over a long time when it grows back. I too had the frizzy white lamb look, then the super curly grey look, then gradually straightened and recovered more colour. I ditched the wig and presented with a really bad perm look for a while, but it was still great to have my hair back. I would say it took 2 years to settle - all quite acceptable but subtle shifts in colour, texture and curl. It's still
a bit curlier than originally (five years on) but less grey so I am pretty content with that!